You'd have to make it quite a big room, about 8x8x8 would probably do, the drowning thing is an issue I guess but if you're worrying about people suiciding then you're probably taking the griefing a bit far 
You can move lava source with a bucket and control the flow with a piston so that's not an issue.
Edited by Mr-Brett at 23:17:29 10-09-2012

You can move lava source with a bucket and control the flow with a piston so that's not an issue.
Edited by Mr-Brett at 23:17:29 10-09-2012
Please don't use the delete button, think of the children.
