As someone who mainly plays FPS games competitively and is, to be fair, reasonably new to the DOTA-style scene by comparison:
In FPS tournaments, the slightest glitch or balance problem, like say for example a character slipping into a wall texture, is grounds for an immediate re-do of the match in most cases, and if it's an issue of the map, the match is usually redone and the same map is not used for the remainder of the tournament. Most big issues are cracked down on very hard in FPS games...
so, to be fair, maybe my opinion's biased - but I know LoL has a great deal of bugs, glitches, and crash problems - I've endured a number of them myself, and I know it's at no fault of my own or user error. Riot could safely say "This is not our fault" by providing the computers for everyone to use and for nothing bad happening as a result. If everyone uses an equal computer with equal equipment and you still have disconnects, (and come now, it's LoL, it's not THAT intensive on your comp, it wouldn't be too big an investment) then the game has a problem. If everyone has to bring their own and you still have disconnects - then you STILL have a problem and riot will still - justly - be blamed for a good number of glitches that happen in LoL that will provide good framing for "motive, means, and opportunity" for anyone looking to blame riot.
Whole issue is avoided by a pause feature, though - the absence of which STILL comes down to blaming riot.
Just swallow your pride, listen to the community, and patch in a pause button as at least a quick-fix untill the disconnect issues, which are probably more labor-intensive to fix, can be worked out. If nothing else, it'll hold people over so you don't have catastrophic problems like this again.
...but right now, as a FPS'er, the idea that this is allowed in a competitive tourney is an abomination to anyone who claims player against player and fair play.