Munchies:
Unsolicited advice is simply advice you did not ask for. Sometimes it's appreciate. Most of the time it's not.
And that's the gamble of it all. No matter how good your advice is, some people do not want to hear it. You can have the best intentions in the world, but sometimes, it will not be appreciated.
This does not mean the person rejecting your advice is wrong to do so. Maybe they already know what they are doing. Maybe they are going for something different that you are suggesting. Maybe they just don't care like that.
Whatever the reason, it's bet to respect their no. If you keep pushing, then no matter how good your advice is or how well meaning your intentions are, you are now the asshole.
Enas:
You are touching on a lot of interesting issues, one being the "objectively helpfull (or unhelpful advice", the other is the possibility that someone who acts as giving (uncolicited) advice, in reality just self-serving himself in some way.
I think ive covered them pretty well on my last replies i wrote just now.
The first attempt may or may not be self serving, but it can go into that territory if you keep trying to force your advice onto unwilling parties.
