Things I probably shouldn't say but most likely will:
I'd like to tell the people pressing Bibles on people at my college to ****-off.
I'd like to tell almost every employee of my local Gamestop that they know nothing about games or gaming and thus should not try to recommend products to me.
I'd like to tell most forum administrators and moderators, although this will not apply to any here as far as I know, that they are on power-trips and should not ban people simply for disagreeing with them.
Things I should most likely say but will probably not:
I'd like to tell one of my friends that her significant other, who is an asshat, has been sleeping around and has no plans to stop doing so.
I'd like to tell my boss' boss that my boss is unqualified, unprofessional, and has done nothing but leech off the credit of others. He also violates company policy by trying to "save" the employees under him; evidently this jerk is a evangelical minister as well as an asshat.
I'd like to tell most of my extended family that I really do not want to go on vacation with them, nor do I want them visiting.