user1760: Is there any protection against replay attacks in BIP148? 
Despite the popular name (UASF), it's effectively a hard fork (in the sense users with old nodes will be on a different chain), is there any protection against taking the transaction from the longer chain and putting it on "UASFCoin" chain, or vice versa? 
Something like Ethereum with EIP155 / chain ID. 

user48884: No. BIP 148 is a soft fork as the BIP 148 chain is valid to all non-BIP148 nodes and can wipe out the non-BIP 148 chain if it were to be longer than it. Because it is a soft fork, there cannot be any replay protection otherwise it would become a hard fork.

1760: <p>Is there any protection against replay attacks in BIP148? </p>

<p>Despite the popular name (UASF), it's effectively a hard fork (in the sense users with old nodes will be on a different chain), is there any protection against taking the transaction from the longer chain and putting it on "UASFCoin" chain, or vice versa? </p>

<p>Something like Ethereum with EIP155 / chain ID. </p>
 48884: <p>No. BIP 148 is a soft fork as the BIP 148 chain is valid to all non-BIP148 nodes and can wipe out the non-BIP 148 chain if it were to be longer than it. Because it is a soft fork, there cannot be any replay protection otherwise it would become a hard fork.</p>
