Some ETs (like the Zetas) have abducted humans for the purpose of study and experimentation. This has never been done without being part of the individual’s Soul Plan, which would also serve the greater good in some way. Abductions like this don’t happen anymore.

Benevolent Groups never take anyone against their will. Starseeds may experience other locations in consciousness without physically traveling there. It is possible for Pleiadians and others of similar abilities to remove an individual from their linear timeline, travel elsewhere for a duration, and be returned to the exact moment they left, without any memory of what happened. This isn’t common, but it is possible.