Aliens and Christmas shopping

Had a pottering about sort of day and went and got some Christmas presents at local independent shops. Saw this curious stickers whilst out:

What the? Quite tempted to get in touch just to see if it is genuine (though obviously I'll chicken out and won't do it).

Then went and got our Christmas tree off a pair of blokes flogging tress out the back of a van in a layby. Any tree, any size for just £20. Not sure it is legal but happy to get a bargain and let them deal with that!