Agree. Mtgox did worse than paypal. While paypal's funds freezing scams usually begin with reversed credit card transactions that put paypal at a loss that they need to recover, in this case here, mtgox has not had any liberty reserve or coins pulled away from itself, but continues with a funds freeze anyway.
You are wrong. Read the thread. A large sum of coins were stolen from a customers account, and were transferred via Baron's Bitcoin client to Baron's account on Mt Gox. When Mt. Gox finds a heap of stolen goods, mixed with goods of unknown origin, he is required by law to lock access to it until the matters are resolved. Would it be better if Mt. Gox was a criminal and went to jail, risking the assets of everyone at Mt. Gox? It is extremely important to us, his customers, that Mt. Gox abides by the law. If you don't like that, you should put your money on some black market where you risk to loose everything to a scam or police raid.
PayPal's locking of accounts often has nothing at all to do with reversed credit card transactions. Often a reversed PayPal transfer is enough, and often not even that. E.g. the Wikileaks donation account, and the donation account for Brian Manning's defence fund. Those were purely political.