I did, too, and I still do. One can make an aesthetic and wholly logical "case", as it were, against the opening "teasers", but in the years When
TOL
was running (and still contemporary in how it looked and in its sensibility generally).
Also, I don't see the "teasers" as in any way
spoilers
. They usually showed a key moment episode in the episode soon to follow, but they didn't give anything anyway aside from
Something Wicked Shall Truly This Way Come
.
Nowadays those
teasers
are nostalgic (for me anyway), and redolent of some of those old tricks and tropes of the movies of the studio era's showing newspaper headlines swirling toward the camera, crowds rioting in the streets; or, in a western, an Imminent Indian Attack, complete with Comanche braves "all dressed up for war", in full regalia.

I always enjoyed the previews of the creatures. I guess I was one of the ones the Networks polled.

Mission impossible is even worse. I look away for three minutes to avoid "pre-watching" the show.
Hulu doesn't show the Outer Limits preview parts by the way. A great place to watch the shows, other than the commercials.
Netflix DOES show the MI previews - Boo Hiss.

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There are a few episodes where the opening is integral to the plot, which is a different matter.
I'm about 12 episodes in, and I've taken to using the 10-second jump forward button on VLC Player at the beginning of each episode except for one (when I forgot), which turned out to be advantageous: "It Crawled Out Of The Woodwork".
The scene shown in the teaser was not repeated during the episode, as with the others, but rather only referred to as the origin of the creature, as well as the episode title.

I'd go so far as to say they should be edited out of the re-issues, because they are merely spoilers. Save them for the DVD bonus features, if at all.
Or as an alternative, put a chapter stop after the teaser, so we can skip it.
There are a few episodes where the opening is integral to the plot, which is a different matter.

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Yeah, they wanted to show a glimpse of the 'Bear' in each episode. People say it became 'Monster of the Week'.

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Leslie Stevens felt the same way, but the network insisted that a teaser be added at the start of the show, preferably showing some sort of monster as a hook. The all-knowing network execs claimed their research showed that viewer interest jumped when they saw a monster in the teaser. But they never really understood the show or gave it the support it deserved, which is why it was canceled mid way through the 2nd season.