As discussed on IRC ([[http://bots.wmflabs.org/~wm-bot/logs/%23wikimedia-analytics/20160113.txt | log]]), these two tables were erroneously deleted from analytisc-store during a troubleshooting session today (based on the mistaken assumption they are "unqueriable" anyway - various successful analyses have been done with the data, see e.g .T118041 - and apparently oblivious of a recent thread about these tables on Analytics-l).
The suggestion was to access the data in Hadoop instead, but as discussed on IRC, this is not an equivalent alternative and would require at least considerable additional setup and conversion work (e.g. to adapt the existing queries from SQL to HQL).
(To be clear, this is separate from the decision to blacklist them - i.e. stop logging events. On Monday, @jdlrobson and I had already resolved to set the sample rate to zero. IMHO the incident also makes clear that we need to improve decision and communication processes about such measures in general - but that's a separate discussion.)