Wrong. It wasn't regular tea. It was Guthix Rest tea, and the glitch was that because it restored your hp over it's maximum (you could drink to +5 over your hp) whenever you drank it, it would refill it to your hp + 5.
Jagex have become lazy. They choose to make randoms more common instead of changing the way they occur in the first place. It's ridiculous getting 2-3 mimes a day. And don't get me started on Evil Bobs.