Hearthpwn

I haven't seen it yet. Curious if it's a thing. Anyone using Crawler on their own swashburgler or N'Zoth first mate? Gives you an option in case your enemy doesn't have pirates? Kinda like blood knights in bubble pally?

I've done it but I'm certainly no expert so I could making a huge loser fail :)  Of course only use it when against a class that has no chance of playing pirates but meh

I use it to eat my own patches turn 2

The most popular Token Jade build runs 2x Bloodsail Corsair and Patches plus Golakka.  Killing Patches with Golakka is a good turn.

Don't do that, it's bad... You lose your synergies, like buffs on your weapon with Bloodsail Cultist or just the buff from Southsea Captain

I'm on the fence about it, on the hand you want Patches in order to enable your T3 Pirates but on the other hand you don't have enough good, low drops and it just instantly wins in the mirror.

I've seen an opponent do it.

Needless to say, I won that game.

(It's a very bad move, even if you eat a 1/1.)

it's okay for druids to eat their own pirates as someone above me stated and it's not a completely bad play in Pirate warrior, the thing is basically a totem golem but sometimes some peoplea re too qucik to do it and then have dead cultists in hand., 

Why would you want to eat your own 1/1 just to load the stats on a fatter minion? It's completely counter-productive. The only way this would be viable is if there was a pirate card like Imp Gang Boss, and even then it's questionable. You'd ideally need a pirate egg card... It's not even worth it to play around something like maelstrom portal or fan of knives. It's an aggro deck, you play into everything, dominate the board in the first two turns and go face. Chances are your opponent doesn't have the required answer. Better yet, play another deck! No, not not aggro hunter.

There is legitimately no reason to do this. 

It's counter productive do eat your own pirate. In a best case scenario, you destroy a 1 mana 1/1 pirate in exchange for a +1/+1 buff. Just think of it like a spell. Would you include in your deck a 1 mana spell that destroys one of your minions to give your played minion a +1/+1? The value is even worse if you destroy a pirate with more than 1 attack or costs more than 1 mana.

Pretty good against opponents (it's like a 0 mana Assassinate and +1/+1 buff). Definitely would play a card like that but not so good on your own minion.

I use it to eat my own patches turn 2

Upgrading your weapon on t3 with Bloodsail Cultist might just win you the game, so you better have a pirate on the board. IMHO crawler in pirate deck is a bad idea.