Parking has become scarce in the city since last Thursday’s hard-hitting storm, with snow mounds taking over much of the available stock in both residential and commercial neighborhoods.

But there seems to be no shortage of threatening notes being left by residents who put out space savers in an effort to secure spots they had shoveled out after the heavy snowfall.

It must be winter in Boston.

At least one complaint was filed over the weekend through the Boston 311 app, the city’s constituent service platform, after someone found an angry screed taped to a space saver in a spot that had apparently been claimed.

“This is the second spot I’ve had to get into [because] someone took the one I spent 2 hours shoveling,’’ the note, found on Colborne Road, in Brighton, said. “Take this and expect your windows to be broken.’’

Pictures of angry messages were also shared on Reddit, with promises of extreme vandalism — “I know where you live,’’ one of the notes warned — if the cars parked in spaces that someone else had cleared were not moved post- haste.

Boston has enforced a 48-hour rule when it comes to the use of space savers. The chairs, cones, tables — whatever they may be — can only be used if a snow emergency is declared. They can then stay out for two days after the snow emergency has been lifted, according to the city’s website. Space savers are allowed in every neighborhood except the South End.

While officials have specific rules for space savers, there’s a zero-tolerance approach when it comes to the threatening notes.

“Any space savers with harmful messages will be removed,’’ city officials said in a statement. “The city encourages residents to report any concerns to 3-1-1, the city’s resident services hotline.’’

With the 48-hour mark since last week’s snow emergency long past, lingering space savers — with or without notes — will be treated as trash and picked up by Public Works crews.

Of course, not everyone has taken a negative approach to the seasonal tradition.

As Universal Hub pointed out this week, at least one person filled their shoveled-out space with a quirky display that featured a poem and some candy. Still, drivers looking for a place to park were told to stay away.

“Cheers, my dears to the New Year,’’ the message, written on bright-yellow poster board in South Boston, said. “And finding parking near but not here . . .’’

Steve Annear can be reached at steve.annear@globe.com. Follow him on Twitter @steveannear.