Definitely crafty, but definitely scumbag. I feel like this falls under the category of exploitation.
Glitching is allowed, being an asshat isn't
OK: hiding (e.g. in the hay)
NOT OK: hiding when last man standing (i.e. delaying)
NOT OK: using a siege shield to reach a roof that can't be reached normally
NOT OK: camping unreachable places
NOT OK: exploiting invisible barriers
NOT OK: going out of map bounds (if you can see unfinished parts of the map, then you should not be there)
NOT OK: ladderpulting
Taken straight from the rules
Just seems like a grey area solved by a quick change of the rules. If you are caught then there will be necessary repercussions.