ALERT: This was seen over Mar-a-Lago today!

Donald Trump might think he can escape ridicule and scathing criticism at his Florida hideout, but he's wrong ... 'cause someone took to the skies to get a clear message to 45.

A sky-writing plane was spotted in the air Sunday heading toward Mar-a-Lago in Palm Beach, and it had a banner trailing behind it ... taking direct aim at the former President. One set of letters read, "TRUMP YOU PATHETIC LOSER GO BACK TO MOSCOW."

Another one read, "TRUMP WORST PRESIDENT EVER" ... talk about subtle, huh?

No word on who might've commissioned the fly-over, but what is clear is that not everyone is happy about DT moving into town. He's been at his private club since Wednesday, when he departed D.C. following a farewell rally ... and it looks like he's back to his usual routine.

[link to www.tmz.com (secure)]

Worst president was the one before him

Oloser

You're an idiot.