How do you handle this?

[gjpure]

I notice this a lot in lower limit games especially when people are having fun and not taking the game seriously:

-A player shows his neighbor his cards then finally mucks.

-A player comments/speculates on hand in a multiway pot.

-String betting.

-And other rules or ethical violations.

When I comment to a player about what they are doing is wrong, I usually always get a defensive response and now I look like the "serious guy" and then people view me as an ahole.

If I tell the dealer, then others may still overhear me and I still look like a nit.

If I tell a floor person, they may or may not do anything and I again it still may come back on me.

I kinda feel like one kid telling on his sibling, but on the other hand why should someone get free information and I don't get the same information?

It's not fair to everyone else.

What's the best approach without looking like a dick?