Your friend has a plan. They are excited about it. You can already see a problem, and they have just asked, “What do you think?”
There is a tempting answer that will keep the conversation pleasant. There is also the answer you would want someone to give you before you sent the message, made the promise, or committed to the whole undertaking.
Being a friend sometimes means saying the thing that makes the next few minutes less comfortable. It also means being careful about how certain you are that you’re right.
Work out what actually worries you
“I wouldn’t do that” covers a lot of ground. You might have noticed a consequence your friend has missed. You might simply want different things.
Suppose a friend wants to move to a smaller town. You would miss the restaurants and hate the drive. They want a garden and already work from home. Your objections may say more about the life you want than the life they are choosing.
A concern becomes more useful when you can name the connection between their plan and a problem. “You said being near your parents matters. How would the extra distance work?” gives them something to consider. “That sounds like a terrible idea” mostly gives them something to defend.
Before delivering a verdict, ask about the part you don’t understand. They may have considered it. They may have information you don’t have. Listen to the answer closely enough that it could change what you say next.
Say the concern plainly and privately
If they haven’t asked for your opinion, try asking whether they want it: “Can I tell you the part I’d be worried about?” If they’d rather not discuss it, respect that. Otherwise, find a moment to talk privately. Announcing your concern to the whole group adds an audience to a conversation that doesn’t need one.
Then be specific. Imagine your friend wants to send an angry message to everyone organizing a community event:
“I think the message needs another look before you send it. The part about nobody doing any work isn’t fair to the people who’ve been helping. What do you need the group to do differently?”
That leaves room to agree that the workload is a problem while questioning the accusation. It also gives the conversation a purpose beyond deciding whether your friend is entitled to be angry.
Use words you can stand behind. If you’re unsure, say so. If you think something is unfair, say what makes it unfair. A long introduction about being a terrible person for mentioning it can leave your friend reassuring you before you have even explained the problem.
Offer help with the problem you identified
You might offer to read a calmer draft, check a detail, or think through an alternative. Keep the offer tied to what they actually want to accomplish.
For the event message, that could mean listing the jobs still uncovered and asking people to choose one. Your friend may have a legitimate complaint about carrying too much. Removing the unfair accusation should leave the complaint clear enough to answer.
If your concern changes after hearing them out, acknowledge that too. “I didn’t realize you’d already asked twice. I understand why you’re frustrated” is a useful response. You can understand more of their situation without endorsing every sentence in their draft.
Leave their decision with them
They may hear you, consider the concern, and proceed anyway. For an ordinary decision that belongs to them, repeating the same objection every time you meet can turn friendship into supervision.
You can also be clear about your own part. “I won’t add my name to that message” is different from demanding that they abandon it. Supporting someone does not require lending your agreement to something you think is wrong.
If things go badly, you don’t need to pretend you never saw a problem. But “I told you so” provides very little they can use now. You can ask what happened and decide what help you can reasonably offer. Their decision may have consequences you cannot fix.
Sometimes they will make it work. “I’m glad it went well” is an answer you can give without adding a reminder of everything that could have gone wrong.