There is no doubt that both in Britain and those countries on the continent where the BBC Crimewatch programme had been broadcast the response was said to have been unprecedented.
But I think it hinges on what is classified as petty as opposed to serious crime which may have escalated from incidents being ignored.
Me - I would consider it to be serious to waken up and be confronted with strange man in my bedroom.
Snip
‘Significantly, there were lots of calls from British people who were in Praia da Luz around the time of MM’s disappearance who had never previously spoken to the Met, so there’s lots of information coming through there,’ he told BBC Radio 4’s Today programme.
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The suspect may have been in the villa or looking around for some time before committing the offences or being disturbed, either by a parent coming in or the child waking up, officers said.
He remained calm even when disturbed, they added.
The incidents had previously been discounted by Portuguese investigators because they were spread over a wide geographical area and there had been no apparent attempts at abduction.
Madeleine McCann Crimewatch: 'Unprecedented' response to police appeal | Metro News
"These offences are very serious and no one has been charged in connection with them. We also need to eliminate this man from our inquiries and ascertain whether these offences are linked to Madeleine's disappearance," he said. remained calm even when disturbed,
"If you have been a victim of a similar crime please come forward even if you reported the incident to police in Portugal, or anywhere else, please do not assume we have been made aware of it."
Madeleine McCann police seek intruder who attacked girls at holiday homes | Madeleine McCann | The Guardian
From the above Guardian link it was strenuously denied that crimes had been ignored. My opinion on that is that the DCI would have worded his appeal differently had that been so.