I wouldn't per se say they're doing nothing about it.

Join us on Friday, for #IOHK's presentation on their "Checkpointing" proposal, a solution to preventing 51% attacks on #EthereumClassic.

When: Friday Sept. 4, 2PM UTC; 7AM PST

Where: Crowdcast (link: https://crowdcast.io/e/9epmnuoc)

cc @SDLerner
 @RSKsmart
 @MaxwellSanchezX
 @Dexaran
ECIP showcase: preventing 51% attacks - Crowdcast
The first in an open showcase of proposals from several developers across the ETC ecosystem giving you, the ETC community,

https://twitter.com/eth_classic/status/1301417644277395457