I would also recommend that you stay away from Paypal like all the other people on that website is saying. Paypal freezes your funds for 180 days for unknown reasons. You could always exchange your Paypal funds into Bitcoin funds in the Currency exchange board. So, if you don't want somebody disputing their payments to you, or getting your account frozen for 6 months, then go ahead and convert all your Paypal funds into Bitcoin.
i have experienced this thing too,my transaction of worth 500$ got freezed due to some reasons.I think it is some sort of system error and some problems about sending the money through a email.All transaction in paypal maybe disputed but there is a way to avoid it.