Perhaps you should check out Code Defender
. It obfuscates your code to make it harder for others to understand and copy.
It doesn't encode or hide it, it simply "spagetti codes" your page to the point of it being too much of a bother to try to copy.
General rule of security: you are never totally secure. All the locks on your doors won't stop someone from driving a truck through the side of your house, but that doesn't mean you shouldn't lock your doors.
It's about making it so hard that the bad guys go bother someone else (like your neighbour). Except for those with an actual grudge, most bad guys are lazy (including people who steal the code of others) - that's why they aren't doing it themselves.
Err... mea culpa
on being a lazy bum who steals metatags....