Why bet/fold so much?

[paperboyNC]

I notice that this forum advocates bet/folding the river a lot. However, the biggest mistake in limit hold'em is to fold to one bet on the river, particularly in a large pot.

Doesn't bet/folding the river also encourage opponents to bluff raise the river and be more tricky against you in general?

One way to test the EV of bet/folding the river, is there a filter for pokertracker to see how often you win after calling a river raise?