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[Davy_Mcwrecker]

No it doesn't. Here is what I put for my "stamp", ( I added some spaces. )
[SIZE="6" ][FONT="Light Up The World" ]~Davy_Mcwrecker[/FONT][/SIZE]

If I paste this into google, to copy and paste something else, and I copy and paste, it will still say
[SIZE="6" ][FONT="Light Up The World" ]~Davy_Mcwrecker[/FONT][/SIZE]

and if I copy in paste back into the forums, it will still be

[SIZE="6" ][FONT="Light Up The World" ]~Davy_Mcwrecker[/FONT][/SIZE]

Therefore, it does not rener the stamp useless.

~Davy_Mcwrecker