Now that Lindsay Lohan has returned ... so have some of the opportunistic leeches masquerading as her friends ... and according to sources close to the actress, the "bad people" are once again up to their old tricks.
We're told the same people who helped steer Lindsay's life into a downward spiral smell new opportunities to take advantage ... and are desperately trying to "snake their way back into her life."
According to sources, "They have been calling Lindsay non-stop ... and she's been talking to them." One source adds, "It's scary ... they could take her off the right path."
As we previously reported, the price of Lindsay's treatment at the UCLA facility ran around $130,000 -- we'll see if the investment pays off.