Spambots that favourite random tweets on Twitter - a possible (gradual) solution

I am a bit surprised that @Twitter's not suspended these accounts. They are not necessarily posting spam (mostly sharing identical tweets with photos of underdressed people) but I don't think they're contributing that much to Twitter. I've blocked all of them after they've favourited tweets of mine. I assume favouriting is to make the account look like it's engaging in 'normal Twitter behaviour'. But perhaps I am just a terrible prude ;)

There are instructions below if you want to block them in one go. I've used TweeterID to convert their Twitter names to their Twitter ID, which Twitter uses for blocklists.

There seem to be hundreds of them but here's a selection:
https://twitter.com/JuliaOconnoztj
https://twitter.com/RubyFrazieratw
https://twitter.com/LilianaMaxw8lj
https://twitter.com/SydneyCrawfdo1
https://twitter.com/Teahyunggi32172
https://twitter.com/BossSaranin
https://twitter.com/ValyaChekinev [Google search results for 'her' image - http://preview.tinyurl.com/orwp7pl]
https://twitter.com/1980Urban
https://twitter.com/v_ignatenkov - not awfully safe for work ;)
https://twitter.com/ryasnovl - OK this one might just be a webcam sort of thing
https://twitter.com/MissVariychuk
https://twitter.com/LadySlablyuk
https://twitter.com/zalymova
https://twitter.com/phili_trask
https://twitter.com/robyn_rockin1
https://twitter.com/1973Dolganova
https://twitter.com/kovaltsovl
https://twitter.com/1997_voronina

INSTRUCTIONS for spamblock2015 file
Save a copy of https://dl.dropboxusercontent.com/u/4000104/spamblock2015.csv
Delete Column B - all that should remain is a single column of numbers

Using the desktop version of Twitter log in and go to Settings / Blocked: https://twitter.com/settings/blocked
Click the 'Advanced options' link then 'import a list' then 'Attach a file to upload' - upload the file. To be honest I've no idea what happens after that!

Every so often I'll update the file with the new ones I block, filename won't change. Assuming it works if you check back and download then upload a later version of the file it will overwrite and you'll be blocking more of the spammers. I'm hoping that this might get Twitter to start suspending these accounts (in which case the list of accounts to block will actually reduce).

spamblock2015.csv file last updated 20 July 2015, 14:45 BST (prev 17 July 2015, 22:20).