Frustrated NT Police have urged Alice Springs residents to stop complaining about crime on social media and help them by reporting incidents using traditional methods.

During a recent spike in youth crime, Alice Springs residents posted on social media about things they had observed rather than notify police, Acting Assistant NT Police Commissioner Kate Vanderlaan said.

She said participation in the Alice Springs Neighbourhood Watch program had waned in recent years, but said police were recruiting new members.

"Report it through 131 444 or even through triple-0 or even through Crime Stoppers ... those are the avenues," Assistant Commissioner Vanderlaan said.

"Be part of the community rather than be negative towards things that are going on."

On Thursday NT Police announced "high visibility patrols" would operate across the weekend into the following week due to an expected increase in visitors from outlying communities to a sporting event.

Superintendent Travis Wurst said police would work with Tangentyere Night Patrol, who will co-ordinate the use of various night patrol teams from across Central Australia, to assist with managing the influx of people.

"Police welcome visitors to Alice Springs and remind them to plan their stay, plan your stay, ensure you have funds for accommodation, plan your return home and respect our community," he said.

"Anti-social behaviour and public intoxication will not be tolerated."

Vigilante force being 'monitored' by police

Last week Alice Springs police called for witnesses to several incidents, including two sexual assaults and a break in at a business allegedly by teenagers.

Last weekend four people were arrested in three separate incidents in relation to domestic and family violence and assaults.

In May, NT Police took 34 people into protective custody in Alice Springs, arrested three young people for trespassing and drove 77 people home.

Police reported being pelted with rocks when responding to call outs.

In response, police announced Taskforce Neo to try to reduce the rates of youth crime in Alice Springs and remote parts of the NT.

"The number of youth offenders across the Territory has doubled in the last 12 months," Deputy Police Commissioner Mark Payne said at the launch of Neo.

Alice Springs had 3,000 visitors during the Easter period, and a spike in property break-ins was attributed by police to children visiting from remote communities.

In May, a group called Alice Springs Volunteer Force (ASVF) advertised on social media for people with "firearms experience" who were "willing to teach others" to take part in a vigilante-style group.

"Be a part of something to be proud of," the message from the group read.

The group's founder, Irish expat Gary Hall, would not say how many members the ASVF had, but told media "we don't have a force of 500 men but it's not three blokes sitting in a coffee shop smoking cigars".

An NT Police spokesperson said "upholding of the law is always best left to professional law enforcement officers" and they were "monitoring" the group.