Think before you tweet.

Both "Supernatural" stud Jared Padalecki and "Star Trek: The Next Generation" star LeVar Burton are in hot water for some messages they posted on Twitter following Philip Seymour Hoffman's death.

While one of the two has already removed his inflammatory remarks, the damage is done -- and he had to later defend himself from some major online backlash.

First up, let's look at Padalecki.

According to a Jezebel screen grab, the actor tweeted "'Sad' isn't a word I'd use to describe a 46 year old man throwing his life away to drugs. 'Senseless' is more like it. 'Stupid.'

He removed it after some negative feedback and then tweeted out again to clarify his remarks.

Burton, on the other hand, decided to make a joke after Hoffman was found dead with a needle in his arm.

The backlash was pretty instantaneous for him as well, with Burton responding to fans calling him out.

While they're entitled to their own opinions, they might want to think twice about their words before sending them out to their millions of followers in the future.

Click here to see more (appropriate) celebrity reactions to Hoffman's shocking death. Plus, click here see what Jennifer Lawrence and the cast and crew of "The Hunger Games" had to say about his passing -- and how they plan to continue the franchise now.

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