Webmoney is Russian paypal in that they seize accounts all the time and demand notarized ID if you move more than a few hundred dollars. Libertyreserve is long gone and the owner(s) in prison. They also seized accounts if you moved over $9k without ID.

Using BTC-e is essentially rolling the dice. The Russian/Bulgarian operators can disappear at anytime they like with the entire current volume they are anonymous and also not insured, existing on rep only which doesn't mean very much. They could easily put up a million worth of bitcoin as insurance somewhere held in a trust and refuse to daily trade over that insured amount, that they don't says they plan to just disappear one day.