Actually, it's NOT a bad idea! You can replace the tall gas block if you prefer, but I think it will grow on you. I look at it as like it is an extended front end of a top accessory rail!
Also, it is drilled and tapped on it's bottom for a sling mount . . . though many people will mount the sling on accessory rails to improve accuracy.
I just put a set of the new Magpul MOE handguards on my new M&P15 OR, and it has spots on each side AND the underside of the handguard to mount accessories. I'll be mounting my sling on the side of this handguard probably, or on the bottom.
Best of all, it is low in cost (less than $30) AND provides a better gripping surface! HIGHLY RECOMMENDED!
Tom