Don't let the other members of the community get to you, but don't tell them you don't care.
Ingame?
-Don't place a brick just to get something out of it. Like throwing a vehicle spawn on the ground for the sake of having a vehicle. Build something interesting and put a vehicle spawn in a suiting place.
-If you do place a brick because there was an item you needed, be sure to remove it shortly after picking the item up, unless it's used for the build/minigame.
-If someone insults you for your building skills, ask them what's wrong with it. Criticism is good for improving your skills. If an admin kick/bans you for your building habits, then don't ever bother trying to get back in. It's probably not a good server.
-Only annoy friends, because they know you're just playing around.