Well it depends on the game actually. Some games had me hooked to the computer for more than an hour in the same site! There are many sites providing quality games for free!

one of them is armorgames.com

i think it really influence children and people.Really its like alcahole.once you have it you will have atendency to have more.same with the games.

Yes, certainly. Online games are very addictive.

Lately online gamming has emmerged as very strong profit making industry. it has crossed 1 billion turnover mark. so to hookup as many clients or gammers thease games are made more and more interesting. so no wonder to make big buks vendors make games more and more interesting & addictive.
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Love Moves the world.