It is very frustrating. It is also impossible to go afk for a minute or two to get a drink or something when in the sector maps because every time I do I always get sucked in to a DSE even if there didn't seem to be one nearby at the time.
At least a clicky in the options somewhere that gives you the choice to go in to them automatically or not
Random DSEs don't bug me too much, as long as they don't get in the way of other game play.
In Gamma Orionis, they get in the way. The only way I've been able to get to get back and forth to and from the B'Tran Cluster to Battle Group Omega is by trailing along the extreme map edge. Borg show up way too frequently and in numbers way too large.
Another trick I've found for avoiding Borg DSEs for the curious: if a cube is getting too close and you're close enough to the edge, make the "Warp to..." dialog come up- I'm not sure if it's programmed constraints or what, but I've never had an enemy override that dialog to suck me into a DSE. Not yet, anyway.