It would be silly to focus on a handpicked group of people to try and cancel their votes when it is well documented that the election had signficant problems of many types in many counties. There was major touchscreen fraud and glitches and other problems in Snohomish County that is known to have had significant effect on the totals there, in both presidents and govenors race- likely much more than a group of potential felons.
You can find a group of felons who voted in any state and most big counties in any election and you could also find others who voted and were ineligible for other reasons. If one was going to revisit a race like the Gov. race in Washington again, they should look at all counties again in detail-quite a process; but they would find lots of problems to argue about.
Documentation showing major problems in Snohomish, the 2nd largest county
http://www.flcv.com/snohomis.htmlthere is also other such
votersuntite for example