I looked around and I couldn't find these post anywhere.
I had to find out all of these server crashing issues on my own.
Maybe my players are a lot dumber than others.
Maybe this is just on my server, I have no idea, but it's an issue everyone that runs a server needs to address and test out on there server.
Water Strainer
Placed in Buildcraft oil, crashes server.
Log back in without deleting your player.dat, crashes server.
When the chunk is loaded, crashes server.
Vanilla Dispenser
Try to Dispense coffee, crashes server.
Doesn't require a player.dat delete though.
CompactSolars
Go ahead worldedit them babies in, and crash your server.
When the chunk is loaded, crashes the server.
(Work around, remove the MOD and the config restart the server, load those chunks again, log out, stop server, add MOD and CONFIG back in and fixed.)