yes i agree, i don't see like this on FaucetHub but i say this notice in general, but sure not all micro-wallets
for ePay i understand, and sorry for misunderstanding.
however, one day i got hacked on my site and hacker withdraw ~0.001 btc using ePay.
i clicked on cancel withdraw from my ePay panel, it sent pending request. i tracked it later and i find it paid to hacker.
it was not big payment, but i hope to set cancel transaction to be instant as we can decide if we want to pay or not.
i know some bad people may use this to cheat their users, so you can set limit for instant payment cancellation as like 3 instant cancel per week which is enough for real hack attempts.
Thanks for reading!