UN-Heroic!!

Last night I watched the season finale of 'Heroes' on NBC.
I was Ecstatic up until the closing scenes then they did the unforgivable!
****SPOILER****
If for some reason you have not yet seen the finale and wish to be surprised stop here. OK. If you have been watching you know there was an overall theme involving stopping the murderous Sylar.
You likely also know that Hiro's destiny was to kill Sylar and so he does. Until, in the closing shots we see a bloody trail to a manhole cover.
NOOOOO!!!!!! PLEASE! if there are any future writers out there, DO NOT succumb to participating in this cheapest of tricks. When the bad guy gets killed, LET HIM DIE!!! be creative enough to come up with a fresh challenge for the next volume.
This trick makes the entire plot line and actions involving Sylar pointless. Don't do this! Sheesh!