prevent drag of text selection in terminal

Sometimes when I use the mouse or trackpad to grab a chunk of text in the terminal (previous to copying and pasting into another application, for example), OS X decides to drag the selection within the terminal (i.e. pastes it in to the terminal window while I'm still moving the mouse or trackpad). This is usually disastrous, especially if I'm currently in an editor or other environment running on the terminal, because it will interpret all the pasted text as commands, sometimes resulting in a lost document. Is there a way to disable this behaviour? Thanks!

 

That's a great tip, thank you! Now to get it in my finger memory...