I’m user of Czech Wikipedia (over 11000 edits), bureaucrat on Czech Wikisource (over 21000 edits) and sysop on Czech Wikiquote (over 2000 edits) and Czech Wiktionary (over 17000 edits) with minor edits on other projects – all projects…
I was founder member of Wikimedia Czech Republic, in its early years also member of the board and auditor. Due to my disagreement with insufficient protection of members personal data I was kicked out of WMCZ in September 2013.