Noticed the "tip" today about using a can of Easy-Off Oven Cleaner as a weapon. As I've been using this stuff for more than a decade to remove enamel paint from rare, restorable plastic model car bodies, I thought I'd give you my two cents on it.
The active ingredient in Easy-Off is lye. This is harmful stuff but hardly incapacitating. I routinely hold the model car body in my ungloved hand as I spray Easy-Off on, and then, about 20 minutes later, again as I brush the goop and the old paint off with an old toothbrush (which takes maybe 5 minutes). In both cases I just wash my hands in soap and hot water immediately thereafter and have never felt any discomfort whatsoever. I do have a friend, however, who was doing this once and got some of the stuff between his arm and the sink that he was leaning on for some period of time (in excess of 5 minutes). It DID eat into his flesh and left a wound that reminded me of a shark bite. (He was using a brand called Mr. Muscle but the MSDSs on the two products are nearly identical.) This gory wound caused him no pain at all while it was being inflicted (it hurt like hell later, of course).
The stuff would be nasty on or in your eyes and I ALWAYS wear eye protection when using it, even if nothing more than a $2 pair of sunglasses. Spray this stuff into someone's eyes and it WILL cause them eye damage--eventually--if they don't get it flushed out most rikki-tik. They will probably close their eyes but even so, I wouldn't count on this stuff keeping someone from cutting my throat or beating me to death with a pipe before it REALLY started to hurt.
And then there is the spray pattern. Easy-Off doesn't come out in a stream, it comes out in a spray, so you would have to be within a few inches--I'd say one foot at the very outside--of an attacker's eyes to have any effect at all. If the attacker is wearing glasses or "shades," he won't even know for several minutes (if at all) that you were spraying him with something you considered to be a "weapon."
As you can see I'm not too wild about the protective properties of this product, as IMHO it has just about zero stopping power. IF you can manage to give someone a good dose of it right in the face (the eyes, particularly), IMMEDIATELY take advantage of the situation and MOVE while he's blinking or reacting, so he doesn't just start attacking where you just were in blind fury. Get around him/behind him and get away (or bash him over the head with a chair, if you're feeling particularly dashing).
Multiple attackers and your weapon is Easy-Off? Rotsa Ruck, baby.