Example:

Hole Cards: J 10 (suits dont matter)
Flop: J 2 4

You raised preflop late position, someone called. Now: He bets it as a bluff, and you call or reraise, w/e you choose, but he calls.

Turn: K

Now he bets harder...There is no reason to believe he has the king right? What if he was bluffing and now he has hit the king. He is justified in calling to show strength and if hit, a follow up bet would look like a continuation bet or bluff once again....

How do you guys avoid this or you dont lol??

One more Thing:

In my games, i encounter retards to put in a bet to steal blinds with a shit hand, I reraise with a decent hand, and they call. They call because they feel they have chips invested which is stupid to say the least unless the have connecters or other decent cards. When dealing with these types of people should i Raise harder to show i have strength, or smooth call hoping to hit or what? What is the best approach and why?