LeBron Haters Out in FORCE in Cleveland!

LeBron James is officially back in Cleveland to take on the team he scorned just a few months ago  -- and people all over town couldn't be more PISSED about it. 

All over Cleveland, people are sporting anti-Lebron gear -- including the staff at several restaurants ... including The Winking Lizard (above) and Harry Buffalo (below) ... both situated near the arena. 

In fact, the Harry Buffalo has issued a temporary ban on anyone wearing a LeBron jersey.

The game is set to tip off in just a few hours -- in case you haven't heard, fans are already planning anti-James chants ... and the Cavs have pumped up stadium security. 

You're gonna wanna 'witness' this one. 

LeBron Parties 'til 2AM ... then Crushes Pistons

Before the Miami Heat destroyed the Detroit Pistons last night, LeBron James got into the zone ... by partying with some teammates into the early hours on Wednesday morning.

Just hours before the Pistons game, LeBron was spotted leaving Miami's Lucky Strike bowling alley around 2 AM in a douche bag Orange Jeep.

'Bron spent the night hanging out with embattled boxer Floyd Mayweather. 

Maybe he needed to pick up some tips before his super-highly anticipated return to Cleveland tonight ... where he's set to square off with the Cavs ... and thousands of angry fans.