Steph Curry -- Fan Goes Too Far For An Autograph ... Now My Family Is Freaked

Steph Curry is one of the true nice guys in the NBA ... but warning to any fans who get too close for comfort -- he has no problem putting you on blast.

BSO called out a tweet from the league MVP ... who got pissed when someone hounded him on a freeway.

Curry has been on cloud nine for months -- winning the NBA Championship, the MVP award, and the birth of a baby girl -- but this little run-in quickly brought him back down to reality.

Unclear if he contacted police over this incident, but it sounds like he's ready to do so, if necessary.