You should bring a gun with just in case.
Please don't go.
Bring anything sharp and/or pointy just in case hints go awry. If you were to have to use it, it would be justified self defense at the very least.
wont you be charged with murder/manslaughter though
People who actually intend to shoot up schools don't warn others before they do it. This is almost definitely a prank.
"Some of you guys are alright"