These tweets show why it could be a long time before most people use Amazon's service that puts packages in your home when you're gone

Amazon

• Amazon Key will allow delivery people to enter your house to drop off packages when no one is there.
• Twitter exploded when the service was announced on Wednesday.
• People's privacy concerns are justified, according to an expert.

On Wednesday, Amazon announced Amazon Key, a new service that allows the company to deliver orders inside your home when no one's there.

The service will launch in 37 cities and regions on November 8, with more to come. For people to participate, they will need to be Amazon Prime members and own certain special equipment.

It's entirely opt-in - Amazon isn't going to force anyone to open up their doors so that delivery people can sneak in and drop off packages.

However, concerns over privacy and the general creepiness of a company having the ability to enter your home unattended didn't sit well with many people.

Twitter DarrenKavinoky

Here's a sampling of some of the best reactions on Twitter:

Twitter michaelbozzello

Twitter Rhymestyle

Twitter KevinPlantz

Basically, people are semi-convinced that they're going to get robbed and/or murdered.

Twitter MikeH5856

Twitter roywoodjr

Twitter MikeDrucker

While most people are joking, privacy expert Joel Reidenberg, a professor of law at Fordham University School of Law, told Business Insider that there's a legitimate reason for privacy concerns. However, snooping may be more likely than stealing, as Amazon would require users to have cameras in place.

"The likelihood is the terms of service ... will deny liability for anything that happens in the context of delivery," Reidenberg said. "So if a delivery person violates the homeowner's privacy while they're in the home, there's pretty much no recourse that homeowner has for that privacy violation."