# What is the best practice around filtering out search results with curse words

**URL:** <https://discuss.elastic.co/t/what-is-the-best-practice-around-filtering-out-search-results-with-curse-words/23455>\
**Category:** Elasticsearch\
**Created:** [April 28, 2015, 11:01pm UTC](https://discuss.elastic.co/t/what-is-the-best-practice-around-filtering-out-search-results-with-curse-words/23455 "2015-04-28T23:01:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![varun\_kumar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/varun_kumar/32/24170_2.png) [@varun\_kumar](https://discuss.elastic.co/u/varun_kumar)\
**Post date:** [April 28, 2015, 11:01pm UTC](https://discuss.elastic.co/t/what-is-the-best-practice-around-filtering-out-search-results-with-curse-words/23455/1 "2015-04-28T23:01:05Z")

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Hey All,  
I want to filter out docs with hate words in my search result. Currently we  
are having bool filter in every search query for the list of all words. And  
this results in tons of slow queries, since the list of hate words is long  
(So much of hatred around ☹ )

I was wondering what are the best practices for this spam/hate words  
filtering.

Here are what we are considering:

1. Pre-process : Scan the doc prior to indexing and hence mark them bad or  
do not index them.  
Problem : The documents are indexed from several processes and it is  
difficult to force the rule on any new component some one writes.

2. Creating a percolator and running it periodically (Not sure of the best  
frequency and timing) to tag all documents with bad words as "badDoc" :  
true. Hence have a filter in all the queries.  
Problem : Not sure of the performance impact due to periodical running  
of percolator, secondly the same problem of discipline in all queries to  
exclude badDoc

Personally I would favor a pure ES solution and I am sure this is not a new  
problem, and hence seeking expert guidance and best practices.  
Any guidance/links would be helpful!

Thanks and Regards  
Varun

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 12:17am UTC](https://discuss.elastic.co/t/what-is-the-best-practice-around-filtering-out-search-results-with-curse-words/23455/2 "2017-07-06T00:17:13Z")

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